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SY88922KG Datasheet(PDF) 1 Page - Micrel Semiconductor |
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SY88922KG Datasheet(HTML) 1 Page - Micrel Semiconductor |
1 / 6 page 1 SY88922 Micrel, Inc. M9999-091906 hbwhelp@micrel.com or (408) 955-1690 DESCRIPTION ■ Up to 2.5Gbps operation ■ 25mA peak drive current ■ Separate modulation control ■ Separate output enable for laser safety ■ Differential inputs for data ■ 75KΩ input pulldown resistor ■ Designed for use with SY88923, SY88904 or SY88905 ■ Available in a tiny 10-pin (3mm) MSOP The SY88922 is a high-speed current switch for driving a semiconductor laser diode in optical transmission applications. The output current, or modulation current IMOD, is DC current controlled by IRSET, current through the resistor RSET. The output OUT is HIGH when output enable is HIGH. The device incorporates complementary open collector outputs with a capability of driving peak current of 25mA. The resistor REXT must be placed between /OUT and VCC to dissipate the worst case power. RSER is recommended to compensate for laser diode matching issues. The SY88922 utilizes the high performance bipolar ASSET™ technology. FEATURES SDH/SONET 2.5Gbps LASER DIODE DRIVER BLOCK DIAGRAM SY88922 ■ 1.25Gbps Gigabit Ethernet ■ 531Mbps and 1062Mbps Fibre Channel ■ 622Mbps SONET ■ Gigabit Interface Converter ■ 2.5Gb/s SDH/SONET APPLICATIONS DIN VCC REXT OUT OUT RSER to Laser Diode DIN Modulation Control Internal Logic BIAS Control EN IMOD VREF 40X RSET GND VCC GND RSET Rev.: D Amendment: /0 Issue Date: September 2006 |
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